William hepfinger



W. HEPFINGER.

LETTER D RAFTING INSTRUMENT. APPLICATION FILED JAN. 21. 1919.

Patented June 5%, 1919.

WITNESSES A [NI/Em tltll OFFIGE.

WILLIAM HEPFINGER, 0F BIRMINGHAM, MICHIGAN.

LETTER-DRAFTING INSTRUMENT.

Specification of Letters Patent.

Patented June 24:, 1919.

Application filed January 21, 1919. Serial no. M2356.

To all whom it may concern:

Be it known that I, WILLIAM IIEPFINGER, a citizen of the United States, and a resident of Birmingham, in the county of Oakland and State of Michigan, have invented certain new and useful Improvements in Letter-Drafting Instruments, of which the following is a specification.

My invention relates to improvements in drawing instruments, and consists more particularly in an improvement in instruments for designing or outlining letters and numerals.

An object of my invention is to provide a pattern made ofmetal or any other suitable material, by means of which amateurs and others can quickly and accurately lay out letters and numerals.

Other objects and advantages will appear in the following specification, reference being had to the accompanying drawing in which Figure 1 is a perspective view of the improved letter drafting instrument, and

Fig. 2 collectively shows samples of the work capable of being done by the instrument.

The instrument 1 is generally of the shape of a T-square, in that it has a head 2 which is grasped by'one hand, and a blade 3 by means of which straight lines are drawn by a pencil or instrument in the other hand. The head 2 consists of three cross branches 4: that are integral with the blade 3 and are mutually joined by curved ends 5.

These curved ends are inscribed with guide lines 6 that radiate from the centers of the curved ends 5, and these guide lines are for the purpose of aiding the operator in designing the letters. That is to say, he can tell more accurately just where to stop a curved line in forming the particular letter or numeral that he may be making.

The blade 3 is graduated in inches at 7 and is provided with certain-other graduations 8 that run longitudinally of the blade for the purpose of defining the inward extension of various ones of the graduations of fractional parts of an'inch. The 'numeral placed in the center of the head 2 indicates the size of letter that is to be made by the instrument. In the present instance the size is 2 inches. The instrument can be made to construct any desired size of style of numeral or letter.

pointing toward the bottom of the board and drawing around the right hand part of the head 2. The dotted line portions of the letter B in the lowermost line in Fig. 2, indicate where the solid portions of the branches 4 come and through which the pencil cannot of course go.

The spaces-thus left are later connected by applying the blade 3. And to this end the width of the blade is the same as the width of the various parts of the head, all of these widths being preferably in proportion-to the size of the letter, so that in certain circumstances the proper width of the parts of a letter can be gotten by simply drawing lines on either side of the blade or the parts of the head.

I claim A letter and numeral drafting instrument substantially like a T-square consisting of a blade, having a head at one end with parts out out to form a plurality of cross branches with mutually joined and rounded closed ends, toform pencil guides for the construction of various parts of letters and numerals, said blades and head being of a uniform w1dth throughout and provided with graduations.

WILLIAM HEPFINGER. Witnesses C. H. YAXLEY, C. F. SMITH. 

